code: def test_refutation_placebo_refuter_binary(
      self, error_tolerance, estimator_method, num_samples
  ):
      refuter_tester = SimpleRefuter(
          error_tolerance, estimator_method, "placebo_treatment_refuter"
      )
      refuter_tester.binary_treatment_testsuite(
          tests_to_run="atleast-one-common-cause",
          num_samples=num_samples,
      )
  
file_path: dowhy/tests/causal_refuters/test_placebo_refuter.py
imports: import random
  from pytest import mark
  import dowhy.datasets
  from .base import SimpleRefuter
label_desc: Use image node_id 2 for calling the TestPlaceboRefuter obj's underlying member method code with example usage: obj.test_refutation_placebo_refuter_binary(error_tolerance, estimator_method, num_samples) without return types